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STM32之CAN总线例程

STM32之CAN总线例程#include "stm32f10x.h"

/* RCC时钟配置 */

void RCC_config(void)

{

ErrorStatus HSEStartUpStatus;

/* RCC寄存器设置为默认配置 */

RCC_DeInit();

/* 打开外部⾼速时钟 */

RCC_HSEConfig(RCC_HSE_ON);

/* 等待外部⾼速时钟稳定 */

HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)

{

/* 设置HCLK = SYSCLK */

RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* 设置PCLK2 = HCLK */

RCC_PCLK2Config(RCC_HCLK_Div1);

/* 设置PCLK1 = HCLK / 2 */

RCC_PCLK1Config(RCC_HCLK_Div2);

/* 设置FLASH代码延时 */

FLASH_SetLatency(FLASH_Latency_2);

/* 使能预取址缓存 */

FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

/* 设置PLL时钟源为HSE倍频9 72MHz */

国家公路网规划发布RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* 使能PLL */

RCC_PLLCmd(ENABLE);

/* 等待PLL稳定 */

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

/* 设置PLL为系统时钟源 */

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

/* 等待系统时钟源切换到PLL */

while(RCC_GetSYSCLKSource() != 0x08);

}

/* GPIO配置 */

void GPIO_config(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

/* 时钟配置 */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);

/* RX */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* TX */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOA, &GPIO_InitStructure);

}

/* 中断嵌套控制器配置 */

void NVIC_config(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

/* 选择中断分组2 */

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

平板艺术音响/* 设置CAN接收中断 */

NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

}

野生动植物资源保护与利用

/* CAN总线配置 */

void CAN_config(void)

{

CAN_InitTypeDef CAN_InitStructure;

CAN_FilterInitTypeDef CAN_FilterInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);

/* CAN1默认参数 */

CAN_DeInit(CAN1);

/* 将结构体填⼊默认参数 */

CAN_StructInit(&CAN_InitStructure);

/* 关闭时间触发模式 */

CAN_InitStructure.CAN_TTCM = DISABLE;

* 关闭⾃动离线管理 */

CAN_InitStructure.CAN_ABOM = ENABLE;

/* 关闭⾃动唤醒 */

CAN_InitStructure.CAN_AWUM = ENABLE;

/* ⾃动重传 */

CAN_InitStructure.CAN_NART = DISABLE;

/* 禁⽌FIFO溢出时覆盖原报⽂ */

CAN_InitStructure.CAN_RFLM = DISABLE;

/* 关闭优先级取决于ID */

CAN_InitStructure.CAN_TXFP = DISABLE;

/* 正常模式 */

CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;

/* 设置波特率 */

CAN_InitStructure.CAN_SJW = CAN_SJW_2tq;

CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;

CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;

CAN_InitStructure.CAN_Prescaler = 4;

/* 初始化CAN总线 */

CAN_Init(CAN1, &CAN_InitStructure);

/* 过滤器配置 */

CAN_FilterInitStructure.CAN_FilterNumber = 0;

CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;

CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;

CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0020;

CAN_FilterInitStructure.CAN_FilterIdLow = 0x0007;

CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0020;

CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;

CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_Filter_FIFO0; CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;

CAN_FilterInit(&CAN_FilterInitStructure);

/* 接收挂起中断 */

CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);

}

/* 毫秒延时函数 */

导线测量法

void delay_ms(uint16_t time)

{

uint16_t i = 0;

while(time--)

{

i = 12000;

while(i--);

}

CanTxMsg TxMessage;

/* 主函数 */

int main(void)氛围英语

{

uint8_t TransmitMailbox = 0;

/* RCC时钟配置 */

RCC_config();

/* GPIO配置 */

GPIO_config();

/* CAN总线配置 */

CAN_config();

/* 中断嵌套控制器配置 */

NVIC_config();

while(1)

{

TxMessage.StdId = 1;

TxMessage.ExtId = 0;

TxMessage.IDE = CAN_ID_STD;

TxMessage.RTR = CAN_RTR_DATA;

TxMessage.DLC = 8;

TxMessage.Data[0] = 0x11;

TxMessage.Data[1] = 0x22;

TxMessage.Data[2] = 0x33;

TxMessage.Data[3] = 0x44;

TxMessage.Data[4] = 0x55;俞芳林

TxMessage.Data[5] = 0x66;

TxMessage.Data[6] = 0x77;

TxMessage.Data[7] = 0x88;

TransmitMailbox = CAN_Transmit(CAN1, &TxMessage);

while((CAN_TransmitStatus(CAN1, TransmitMailbox) != CANTXOK));

delay_ms(1000);

}

void USB_LP_CAN1_RX0_IRQHandler(void)

{

CanRxMsg RxMessage;

volatile CanRxMsg Message;

CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);

Message.StdId = RxMessage.StdId;

Message.ExtId = RxMessage.ExtId;

Message.IDE = RxMessage.IDE;

Message.RTR = RxMessage.RTR;

Message.DLC = RxMessage.DLC;

Message.Data[0] = RxMessage.Data[0]; Message.Data[1] = RxMessage.Data[1]; Message.Data[2] = RxMessage.Data[2]; Message.Data[3] = RxMessage.Data[3]; Message.Data[4] = RxMessage.Data[4]; Message.Data[5] = RxMessage.Data[5]; Message.Data[

6] = RxMessage.Data[6]; Message.Data[7] = RxMessage.Data[7]; }

本文发布于:2024-09-22 00:53:25，感谢您对本站的认可！

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